Metal-grinding machine



,2 Sheets-Sheet 2;

(No-Mod el.)

J. B. HASTINGS; METAL GRINDING MACHINE. No. 438,581. Patented Oct. 14, 11890.

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UNITED STATES PATENT OFFICE.

JOHN 13. HASTINGS, OF JACKSON, OHIO.

METAL-GRINDING MACHINE.

SPECIFICATION forming part of Letters Patent No. 438,581, dated October 14, 1890.

Application filed January 20,1890. Serial No, 337,528. (No model.)

To all whom it may concern.-

Be it known that I, J OHN B. HASTINGS, a citizen of the United States, residing at Jackson,in the county of Jackson, State of Ohio, have invented certain new and useful Im provements in Metal-Grinding Machines, of which the following is a specification.

My invention relates to those grinding-machines for sharpening or shaping various tools of Whatever nature or construction; and it consists in certain features of novelty to be hereinafter described, and then particularly pointed out in the claims.

In order that my invention may be fully understood,I will now proceed to describe it with reference to the accompanying drawings, in which- Figure I is a side elevation of my machine. Fig. II is a plan view thereof; and Fig. III is a section on the line III III, Fig. II.

Referring to the drawings,l represents the bed of the machine, on which the various parts are mounted.

2 represents a shaft journaled in one side of the bed, 3 a belt-pulley, and 4 the d rive-wheel, said pulley and Wheel being arranged on opposite sides of one side of the bed.

5 6 are two pairs of parallel guide-pieces, fixed to the sides of the bed near one end of the same and projecting inwardly, for guiding and providing ways for the two crossheads 7, which are connected by a beam or reciprocating carrier 8, curved upwardly at its center and providing a table 9 in a longitudinalrecess,in which suitably-shapedemery or other grinding pieces 10 are secured by means of aremovable side piece 11 and screws 12. Connected at one end by a pivot-pin 13 to the reciprocating carrier 8 is a pitman 14, pivoted at the other end on a wrist-pin 15, projecting from the drive-wheel 4. By this means the beam 8 is reciprocated back and forth from the belt-pulley.

16 16 are standards projecting up from each side of the bed and made dovetailed to fit in dovetail recesses in the sides of the base 17 of the vertically adjustable toolsupporting frame. Fixed on each side of the base 17 are semicircular or curved guide-pieces 18, on which the clamping mechanism for holding the tools to be ground is adjustably secured in position above the grinding-pieces supported in the reciprocating table. Formed in the curved pieces 18. are slots 19, running lengthwise thereof. Fitted on the curved pieces are four yokes 20two on eachtl1e opposite ones of which are connected by dovetailed cross-bars 21, that pass through dovetailed openings in the clamping-jaws 22. These jaws are adjusted to clamp the tool 23, held therein by means of screw-threaded rods 24, that pass through the yokes 20 and slots 19, and are provided at their outer ends with knobs 25. A portion of each rod from the center outwardly is provided with a righthand screw-thread and the other portion is provided with a left-hand screw-thread, and these screw-threaded portions engage in correspondingly screw-threaded openings in the clamping-jaws, so that when the cross-bars are brought together as close as possible and the screw-rods turned to cause the jaws of each pair to approach one another the tool is clamped tightly between them. The tool may be set at the desired angle above the grinding-piece by means of set-screws 26, passing through the yokes and engaging the curved pieces 18.

The tool shown in the drawings is a pointerdie for a nail-machine, the grinding-piece having an angular edge; but, as I have before intimated, any kind of tool may be ground in my machine that is adapted thereto, the emery or other grinding pieces being shaped according to the shape to be produced on the tool.

The height of the tool-sup porting frame is adjusted by the following mechanism: 27 represents a shaft journaled transversely in the bed 1, one end of which is provided with a hand-wheel 28 or the equivalent for turning it. On each side of the bed, near each end of the shaft 27, is a bevel gear-wheel 28 each of which meshes with a horizontal bevel gearwheel 29 at the lower end of a vertical shaft 30, one being on each side of the bed. Near their lower ends these shafts 30 have bearing in cars 31, and above these cars 31 the shafts are screw-threaded and engage in screwthreaded openings in the ears 32, so that when these shafts 30 are turned through the medium of the horizontal shaft 27 the tool-supporting me is raised and lowered to a height that 1 accommodate conveniently the tool or other appliance sharpened or ground.

Having thus described my invention, what I claim as new therein, and desire to secure by Letters Patent, is-

1. In a metal-grinding machine, the combination of alongitudinally-reciprocating table or support for the grinding material, the vertieally-adj ustable tool-supporting frame extending longitudinally of the table, and the independently-adjustable clamping mechanism on said frame adapted to be adjusted vertically and longitudinally on said frame, substantially as set forth.

2. In a metal-grinding machine, the combination of a reciprocating table or support for the grinding material, a tool-supporting frame having curved portions extending longitudinally of the line of reciprocation of the table and the tool-clamping mechanism adjustable on said curved portions, substantially as set forth.

3. In a metal grinding-machine, the combination of a reciprocating table or support for the grinding material, a tool-supporting frame having curved pieces or guides on each side of said table, and a clamping mechanism for the tool, having clamping-jaws between said curved pieces or guides, and operating-rods for said jaws passing transversely through slots in said curved pieces, substantially as set forth.

4. In a metal-grinding machine, the hereindescribed clamping mechanism for the tool to be ground, having two opposite pairs of clamping-jaws, cross-bars on which each pair is fitted, and operating-rods having right and left screw-threads working in corresponding openings in the jaws, and a support, said mechanism being adjustable on said support, as set forth.

5. In a metal-grinding machine, the hereindescribed clamping mechanism for the tool to be ground having paired jaws, cross-bars on which said jaws are movable, rods having right and left screw-threads working in corresponding openings in the jaws, and operating-knobs forsaid rods, and adjustable means for supporting said cross-bars, substantially as set forth.

6. In a metal grinding machine, in combination with supporting-pieces, the herein-dc scribed clamping mechanism consisting of jaws, cross-bars on which the jaws slide, yokes at the ends of said'cross-bars fitted on said supporting-pieces, and operating-rods having right and left screw-threads working in corresponding openings in the jaws, substantially as set forth.

7. In a metal-grinding machine, the combination of a tool-supporting frame, dovetailed standards by which said frame is guided at each side, and mechanism for raising and lowering said frame, substantially as set forth.

8. In a metal-grinding machine, the combination of the bed, standards thereon, a toolsupportiug frame guided on said standards, and mechanism for raising and lowering said frame, consisting of a rotary shaft having a turning device, bevel gear-wheels on said shaft, vertical shaft-s having bevel gear-wheels at their lower ends meshing with aforesaid gear-wheels, ears projecting from the bed in which the vertical shafts are journaled, and ears projecting from the supporting-frame, having screw-threaded openings for the re ception of screw-threaded portions of the vertical shafts, substantially as set forth.

'9. In a metal-grinding machine, the eombination of the bed, parallel guideways thereon, cross-heads sliding in said ways, a beam connecting said cross-heads at their midlengths, having a table for holding the grindin g material, and mechanism for reciproeatin g the latter, substantially as set forth.

JOHN B. HASTINGS.

Witnesses:

THos. O. GASKENS, R. H. JoNEs. 

